Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f717ab01b4ebffd…

MALICIOUS

PDF

69.4 KB Created: 2020-08-10 08:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 945f95f219794b81dcc89ae0a97d8db9 SHA-1: a32c0c9a94c91c242bb0d251d99d904338c9b42f SHA-256: 4f717ab01b4ebffde1602469a8d369de987bdf325235c4a78be2bdb2a94628bc
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be a lure for interview questions. The primary malicious link, 'https://ttraff.cc/pify?keyword=interview+questions+on+python+for+freshers+pdf', is designed to redirect users to potentially harmful content. The presence of a link farm heuristic further suggests an attempt to manipulate search engine results or distribute malicious links.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=interview+questions+on+python+for+freshers+pdf
    • http://files.rhidexholsters.com/uploads/1/3/1/8/131856539/kiniretete.pdf
    • http://files.echoltdqc.com/uploads/1/3/1/0/131070525/vanifabug.pdf
    • http://ridakakal.richlandpac.com/uploads/1/3/1/4/131406390/970b9098426c021.pdf
    • http://dutilag.meilensteinwein.ch/uploads/1/3/0/8/130874253/mitifeb.pdf
    • http://files.chilcotinoutfitters.com/uploads/1/3/1/4/131437849/finolonaj_gexopokuxomivut_goruro.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/38298449085.pdf
    • https://cdn.shopify.com/s/files/1/0441/1562/4088/files/jquery_ajax_download_file.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/novoxuvifu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6372/files/2001_honda_accord_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/defajabewepa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3965/3030/files/listado_de_precios_aduana_cuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mefiwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6841/files/95522212291.pdf
    • https://cdn.shopify.com/s/files/1/0428/7938/5766/files/consecuencias_del_cancer_de_piel.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/c_xml_document.pdf
    • https://cdn.shopify.com/s/files/1/0434/0632/7959/files/lepisipewidurarobamo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7650/1147/files/jokaro.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a0b3.bin
a1d5f5decf1eb46e6968c6746c7ac2cf7b1b82e8a648f065f57194b09a3277bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B3 5084 bytes
font_01_sfnt_off0000b20d.bin
57947c449212f9f6ec67226ba21f2a7e51293d75b10fe9a484c3f72a250a610d
pdf-font-stream PDF embedded font (sfnt) at offset 0xB20D 15676 bytes
font_02_sfnt_off0000e360.bin
4de993fdf65467371df45ae604b44199a0f9db96dd1987693d1d6f13b22e4334
pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 16428 bytes
font_03_sfnt_off0000f93d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xF93D 4324 bytes